CVE-2009-3086: Rubyonrails Rails

Medium severity, CVSS 5.0. EPSS: 2.2% chance of exploitation in the next 30 days.

A certain algorithm in Ruby on Rails 2.1.0 through 2.2.2, and 2.3.x before 2.3.4, leaks information about the complexity of message-digest signature verification in the cookie store, which might allow remote attackers to forge a digest via multiple attempts.

Affected products

• Rubyonrails Rails: version 2.1.0 only; version 2.1.1 only; version 2.1.2 only; version 2.2.0 only; version 2.2.1 only; version 2.2.2 only; …

Published 2009-09-08. Last modified 2026-06-16.